[SCSI] Disable sym2 driver queueing

Undef SYM_OPT_HANDLE_DEVICE_QUEUEING.
Call sym_put_start_queue instead of sym_start_next_ccbs.
Turn asserts into checks that we can send the command to the adapter,
and return busy from queuecommand if we can't.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index b2ac482caae8..a6cbb90e2bb9 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -1469,7 +1469,7 @@ static int sym_prepare_nego(struct sym_hcb *np, struct sym_ccb *cp, u_char *msgp
 /*
  *  Insert a job into the start queue.
  */
-static void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp)
+void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp)
 {
         u_short qidx;
 
@@ -4602,7 +4602,8 @@ struct sym_ccb *sym_get_ccb (struct sym_hcb *np, struct scsi_cmnd *cmd, u_char t
                          *  Debugging purpose.
                          */
 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
-                        assert(lp->busy_itl == 0);
+                        if (lp->busy_itl != 0)
+                                goto out_free;
 #endif
                         /*
                          *  Allocate resources for tags if not yet.
@@ -4647,7 +4648,8 @@ struct sym_ccb *sym_get_ccb (struct sym_hcb *np, struct scsi_cmnd *cmd, u_char t
                          *  Debugging purpose.
                          */
 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
-                        assert(lp->busy_itl == 0 && lp->busy_itlq == 0);
+                        if (lp->busy_itl != 0 || lp->busy_itlq != 0)
+                                goto out_free;
 #endif
                         /*
                          *  Count this nexus for this LUN.